<section>
  <div class="btn-group" dDropDown [trigger]="'hover'" (onToggle)="onToggle($event)" appendToBody>
    <span dDropDownToggle  class="icon icon-setup"></span>
    <ul dDropDownMenu class="dropdown-menu devui-scrollbar" role="menu">
        <li class="disabled" role="menuitem"><a class="dropdown-item disabled">菜单一</a></li>
        <li role="menuitem"><a class="dropdown-item">菜单二</a>
        </li>
        <li role="menuitem"><a class="dropdown-item">菜单三</a></li>
    </ul>
  </div>
</section>
